[ale] Routers, VRRP, and DHCP

[Michael Still]

On Mon, Sep 14, 2015 at 3:30 PM, James Sumners <james.sumners at gmail.com>
wrote:

>
> On Mon, Sep 14, 2015 at 3:09 PM, Michael Still <stillwaxin at gmail.com>
> wrote:
>
>> This is fairly standard setup it sounds like. You have a dhcp helper
>> config on both routers so that if one router is dead the other still passes
>> along the dhcp requests and updates (note that the log should show it from
>> the router interface IP and not the vrrp IP). Even though its double talk
>> this is what you want to see on the dhcp server log to indicate that this
>> is configured correctly.
>
>
> It does show from the router interface (when I look at a tcpdump of the
> traffic). How is it that this wouldn't be causing issues with assignment?
> Shouldn't multiple answers from the same DHCP host confuse the clients?
>

The client should just use the first response received. Something to keep
in mind is dhcp state synchronization across your servers if more than one
server is active on a subnet at any given time.


>
> --
> James Sumners
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> http://jrfom.com/ (personal site)
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>
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